Offering warmth and sun protection for the core and legs while maintaining full freedom of movement for paddling, the R1® Lite Yulex® Long John is made from 85% Yulex® natural rubber/15% synthetic rubber by polymer content with a 100% recycled polyester lining; the natural rubber is derived from sources that are Forest Stewardship Council™ certified by the Rainforest Alliance. Suggested water temperatures: 65–75° F/18–23° C.